调用方法：

int iBaudRate = InIHelper.ReadConfig<int>("COM_SETUP", "波特率")

InIHelper类：

public class InIHelper      {          private static string FileName = Application.StartupPath + "\\AppConfig.ini";          /// <summary>          /// 读取配置文件          /// </summary>          /// <typeparam name="T"></typeparam>          /// <param name="section"></param>          /// <param name="key"></param>          /// <returns></returns>          public static T ReadConfig<T>(string section, string key)          {              if (File.Exists(FileName))              {                  IniFile f = new IniFile(FileName);                  string value = f.ReadContentValue(section, key);                    if (String.IsNullOrWhiteSpace(value))                      return default(T);                    if (typeof(T).IsEnum)                      return (T)Enum.Parse(typeof(T), value, true);                    return (T)Convert.ChangeType(value, typeof(T));              }              else              {                  return default(T);              }          }            /// <summary>          /// 写配置文件          /// </summary>          /// <param name="section"></param>          /// <param name="key"></param>          /// <param name="value"></param>          public static void WriteConfig(string section, string key, string value)          {              //如果文件不存在，则创建              if (!File.Exists(FileName))              {                  using (FileStream myFs = new FileStream(FileName, FileMode.Create)) { }              }                IniFile f = new IniFile(FileName);              f.WriteContentValue(section, key, value);          }      }

核心代码：

public class IniFile      {          public string Path;            public IniFile(string path)          {              this.Path = path;          }            /// <summary>          /// 写入INI文件          /// </summary>          /// <param name="section">节点名称[如[TypeName]]</param>          /// <param name="key">键</param>          /// <param name="val">值</param>          /// <param name="filepath">文件路径</param>          /// <returns></returns>          [DllImport("kernel32")]          private static extern long WritePrivateProfileString(string section, string key, string val, string filepath);            /// <summary>          /// 读取INI文件          /// </summary>          /// <param name="section">节点名称</param>          /// <param name="key">键</param>          /// <param name="def">值</param>          /// <param name="retval">stringbulider对象</param>          /// <param name="size">字节大小</param>          /// <param name="filePath">文件路径</param>          /// <returns></returns>          [DllImport("kernel32")]          private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retval, int size, string filePath);            /// <summary>          /// 写入          /// </summary>          /// <param name="section"></param>          /// <param name="key"></param>          /// <param name="iValue"></param>          public void WriteContentValue(string section, string key, string iValue)          {              WritePrivateProfileString(section, key, iValue, this.Path);          }            /// <summary>          /// 读取INI文件中的内容方法          /// </summary>          /// <param name="Section">键</param>          /// <param name="key">值</param>          /// <returns></returns>          public string ReadContentValue(string Section, string key)          {              StringBuilder temp = new StringBuilder(1024);              GetPrivateProfileString(Section, key, "", temp, 1024, this.Path);              return temp.ToString();          }      }